exoclock

KELT-19Ab (MEDIUM)

Discovered by: Siverd et al. 2018

The Star
Simbad
GAIA
2MASS		 BD+07 1721
DR2 3142847477107193344
J07260228+0736569
RA 07:26:02.2900 DEC +07:36:56.814
Parallax
3.302 mas		 P.M. RA
-2.85 mas/y		 P.M. DEC
-1.371 mas/y
MagV
9.86		 MagR*
9.733		 MagI*
9.503		 MagJ
9.343		 MagH
9.237		 MagK
9.196
MagG
9.863		 MagGBP
10.004		 MagGRP
9.599
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2459001.42647 ± 0.0001 BJDTDB
Period
4.61173567 ± 8.7e-07 days
Transit Parameters
Siverd et al. 2018
Rp/Rs
0.10713 ± 0.00092		 a/Rs
7.5 +0.2 -0.18
 i
85.41 +0.34 -0.31 deg
e
-		 ω
- deg
DepthR*
13.52 mmag		 Duration*
4.4 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Siverd et al. 2018
Teff
7500.0 +110.0 -110.0 K
 Log(g)
4.13 +0.03 -0.03 cm/s2
 Fe/H
-0.12 +0.51 -0.51 dex
ExoClock Status
Observing Priority MEDIUM
Minimum aperture 5.0"
Total Observations (Recent) 33 (2)
O-C 0.13 ± 1.06 minutes
ExoClock Observations (Recent) 16 (2)
Space Observations (Recent) 4 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 13 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.09912 ± 0.00034

KELT-19Ab


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
KELT-19Ab (MEDIUM)
2026-02-09		Andre Kovacs
Moletai Astronomical Observatory (MAO)		35 cm Maksutov f/3.5
Apogee Alta U47 / R / 20.0		-0.17 ± 1.18
KELT-19Ab (MEDIUM)
2025-02-28		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / Lum / 155.0		-1.7 ± 3.17
KELT-19Ab (MEDIUM)
2024-12-21		Lee YuHsien
KMSH Observatory		C14HD
QSI-660 / R / 20.0		6.12 ± 3.89
KELT-19Ab (MEDIUM)
2024-02-02		Fabio Mortari
Hypatia Observatory		Ritchey Chretienne 250mm f/5.3
MORAVIAN C2-7000A / R / 60.0		4.39 ± 2.45
KELT-19Ab (MEDIUM)
2024-02-02		Guillaume Biesse
Observatoire de la colline Tossius		Ritchey Chretien GSO
ASI 533 MM - Gain=0 / Lum / 172.0		1.66 ± 3.74
KELT-19Ab (MEDIUM)
2024-02-02		Sacha Foschino
Observatoire des Baronnies Provençales		Planewave 430mm
SVO ASI 6200 MM Pro / R / 120.0		-0.22 ± 0.96
KELT-19Ab (MEDIUM)
2023-12-28		David Quiles
David Quiles Observatory		Celestron EDGEHD 800
Omegon veTEC 571M / I / 300.0		4.66 ± 3.6
KELT-19Ab (MEDIUM)
2022-12-01		Mauro Caló
Cavallino		RC
SBIG ST10 / Lum / 60.0		0.38 ± 1.87
KELT-19Ab (MEDIUM)
2022-02-08		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
FLI Kepler CMOS 4040 / R / 135.0		5.98 ± 2.16
KELT-19Ab (MEDIUM)
2022-02-08		Jacques Michelet
Claix		GSO Ritchey-Chrétien
QSI-632 / R / 60.0		1.94 ± 1.73
KELT-19Ab (MEDIUM)
2022-02-08		Robert Roth
TURMX Observatory		Planewave CDK17
QHY600M / rpr / 120.0		1.51 ± 1.87
KELT-19Ab (MEDIUM)
2022-02-08		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		1.51 ± 2.3
KELT-19Ab (MEDIUM)
2022-02-08		Claudio Lopresti
Claudio Lopresti		Meade LX200 12"
CCD Sbig ST9xe / R / 60.0		1.22 ± 3.02
KELT-19Ab (MEDIUM)
2022-02-08		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / R / 120.0		0.5 ± 1.15
KELT-19Ab (MEDIUM)
2022-02-08		Raphael Nicollerat
Observatoire des Valentines K17		Ritchey Chretien
Moravian C3-26000 PRO / Lum / 45.0		-4.25 ± 2.3
KELT-19Ab (MEDIUM)
2022-01-02		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / rpr / 60.0		-0.09 ± 1.44

Space Observations
Planet
Observation Date		 Mission O-C
minutes
KELT-19Ab (MEDIUM)
2019-01-29		TESS0.76 ± 0.55
KELT-19Ab (MEDIUM)
2019-01-24		TESS-0.02 ± 0.56
KELT-19Ab (MEDIUM)
2019-01-15		TESS-0.0 ± 0.56
KELT-19Ab (MEDIUM)
2019-01-10		TESS-0.04 ± 0.59

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2021-01-31 Garai et al. 2022 -0.5 ± 0.45
2021-01-26 Garai et al. 2022 -0.06 ± 0.4
2021-01-03 Garai et al. 2022 -0.08 ± 0.19
2020-12-30 Garai et al. 2022 -0.0 ± 0.33
2020-11-27 Garai et al. 2022 0.1 ± 0.27
2016-12-06 Siverd et al. 2018 -3.49 ± 1.44
2016-01-18 Siverd et al. 2018 2.98 ± 1.44
2016-01-18 Siverd et al. 2018 0.68 ± 1.15
2016-01-18 Siverd et al. 2018 0.54 ± 1.01
2016-01-18 Siverd et al. 2018 -1.77 ± 0.72
2015-03-19 Siverd et al. 2018 2.49 ± 2.74
2015-03-06 Siverd et al. 2018 -2.69 ± 2.02
2015-02-20 Siverd et al. 2018 4.38 ± 1.44
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